gtbary

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Synopsis:

Performs the barycentic correction to photon arrival times.

Usage: gtbary evfile scfile outfile ra dec

Prerequisites

Additional files needed:
(and also distributed with the Science Tools)
  • JPLEPH.405
  • JPLEPH.200
  • leapsec.fits
Links:

General Parameters

  evfile [file name]
    Name of input event file, FT1 format or equivalent.
     
  scfile [file name]
    Name of input spacecraft data file, FT2 format or equivalent.
     
  outfile [file name]
    Name of output file. If the same as evfile, the arrival time correction will be performed in situ in the input file (which must therefore be writable).
     
  ra [double]
    Right Ascension of point source in degrees for which to perform the arrival time correction.
     
  dec [double]
    Declination of point source in degrees for which to perform the arrival time correction.
     
  (tcorrect = BARY) [enumerated string (GEO|BARY)]
    Arrival time correction to apply. Choose BARY to apply the barycentric correction, and GEO the geocentric correction.
     
  (solareph = JPL DE405) [enumerated string (JPL DE200|JPL DE405)]
    Solar system ephemeris for the barycentric correction.
     
  (angtol = 1.e-8) [double]
    Angular tolerance in degrees in comparison of two source positions, one for which the barycentric correction is performed, and another given by RA_NOM and DEC_NOM header keyword of an event file to which the barycentric correction has already been applied. This parameter only has effect if the barycentric correction has been applied to an input event data file. If the two source positions are separate from each other by this amount or less, then they will be considered to be the same position. Otherwise an error will be generated. The sign of the parameter value is ignored. For example, setting angtol=-1.0 results in giving angular tolerance of 1 degree.
     
  (timefield = TIME) [string]
    Name of the field containing the time values for temporal analysis.
     
  (sctable = SC_DATA) [string]
    Name of the FITS table containing the spacecraft data.
     
  (leapsecfile = DEFAULT) [file name]
    Name of the file containing the name of the leap second table, in OGIP-compliant leap second table format. If leapsecfile is the string DEFAULT, the default leap-second file (leapsec.fits), which is distributed with the extFiles package, will be used.
     

Owned by: Masaharu Hirayama hirayama@jca.umbc.edu
  James Peachey James.Peachey-1@nasa.gov
Last updated by: Chuck Patterson 02/105/2011